Bogan carried 15 times, racking up 126 yards and one touchdown. Bellamy had 21 carries for 121 yards. Jayden Reed pulled in seven passes for 101 yards and a score. Jon Wassink threw for 234 yards and three TDs for Western Michigan (2-2).
The Bronco defenders forced three fumbles, recovering two, and had one interception to stop Georgia State.
Both teams opened with field goals before the Broncos sprinted to a 20-9 halftime advantage. Wassink hit Keishawn Watson on a 24-yard scoring strike in the final seconds of the first half. Wassink quickly added another score in the third when Reed hauled in a 40-yard TD toss for a 27-9 advantage. Bogan broke for a 71-yard scoring sprint for Western Michigan's final score with 10:45 left in the third.
Dan Ellington threw for 285 yards for Georgia State (1-3).
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A bye week gave Kirby Smart an opportunity to work out the kinks that plagued seventh-ranked Georgia in its 36-16 loss at LSU two weeks ago.
Ruffin McNeill simplified things significantly for Oklahoma in his first game after taking over as defensive coordinator following the firing of Mike Stoops.
South Alabama wide receiver Jordan McCray grabs the pass from Evan Orth and reaches to the end zone for the 16-yard touchdown.
Troy wide receiver Deondre Douglas catches the pass and reaches for the goal line, scoring the 6-yard touchdown.
South Florida's ability to recover from slow starts will get a serious challenge from Houston on Saturday in a matchup of American Athletic Conference title contenders.